Featured Research

from universities, journals, and other organizations

Climate change and the future of sweet cherry in Australia

Date:
May 27, 2014
Source:
American Society for Horticultural Science
Summary:
Projected changes in global climates were the impetus for a study to determine the viability of sweet cherry varieties in Australia. Researchers established the chill requirement for two common sweet cherry varieties ('Kordia' and 'Sweetheart'). They determined that current cherry-producing regions in Australia will experience sufficient chill in the future to support the production of 'Sweetheart', while regions in Western Australia and Queensland will become marginal, or not suitable, for 'Kordia'.

Predicted variations in global climates have fruit producers trying to determine which crops are best suited to weathering future temperature changes. Extreme high-temperature events are expected to become more frequent, and predictive models suggest that the global mean surface air temperature will rise by as much as two degrees by the middle of the 21st century. Higher temperatures could have an impact on the duration of critical "winter chill" periods needed for successful fruit production, potentially altering growing strategies.

According to the authors of a study published in the March 2014 issue of HortScience, the future of sweet cherry crops may be at risk in Australia. If climate change models are correct, the scientists say that these high-value crops could suffer. Sweet cherry needs adequate periods of winter chill to flourish: insufficient chill can result in poor bud development, sporadic and uneven budbreak, prolonged flowering and fruit development, and non-uniform ripening.

Penelope Measham and Nicholas MacNair from the Tasmanian Institute of Agriculture at the University of Tasmania, along with Audrey Quentin from CSIRO Ecosystems Science, published the results of their experiments using two common sweet cherry varieties. The researchers established the chill requirement for two commonly grown sweet cherry varieties, 'Sweetheart' and 'Kordia', and then explored the uniformity of bud burst and subsequent impacts on fruit maturation in both varieties. They then conducted field trials in a commercial cherry orchard in Southern Tasmania, Australia from leaf fall in June until harvest the following February.

The team determined that the two sweet cherry varieties required different chill hours, and also found that 'Sweetheart' reached mean time to, and maximum total bud burst, faster than 'Kordia'; no significant differences in uniformity of bud burst were found between the two varieties. The results demonstrated that the success of initial and total bud burst increased with time at low temperatures and under natural field conditions. "The results we obtained by matching chill accumulation to tree phenology showed that cherry-producing regions in Australia will experience sufficient chill to support the production of the variety 'Sweetheart' with an increase in mean winter temperature of 1 ēC," stated corresponding author Penelope Measham. "Regions in Western Australia and Queensland will become marginal, or not suitable, for 'Kordia'."

The authors said their study demonstrates the complexity of quantifying chill in line with tree phenology, and shows the challenges for growers who seek to implement chill information. They noted that additional strategies for ensuring cherry trees meet specific chill requirements are needed for marginal areas.


Story Source:

The above story is based on materials provided by American Society for Horticultural Science. Note: Materials may be edited for content and length.


Journal Reference:

  1. Penelope F. Measham et al. Climate, Winter Chill, and Decision-making in Sweet Cherry Production. HortScience, March 2014

Cite This Page:

American Society for Horticultural Science. "Climate change and the future of sweet cherry in Australia." ScienceDaily. ScienceDaily, 27 May 2014. <www.sciencedaily.com/releases/2014/05/140527114926.htm>.
American Society for Horticultural Science. (2014, May 27). Climate change and the future of sweet cherry in Australia. ScienceDaily. Retrieved September 22, 2014 from www.sciencedaily.com/releases/2014/05/140527114926.htm
American Society for Horticultural Science. "Climate change and the future of sweet cherry in Australia." ScienceDaily. www.sciencedaily.com/releases/2014/05/140527114926.htm (accessed September 22, 2014).

Share This



More Plants & Animals News

Monday, September 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: San Diego Zoo Welcomes Cheetah Cubs

Raw: San Diego Zoo Welcomes Cheetah Cubs

AP (Sep. 20, 2014) — The San Diego Zoo has welcomed two Cheetah cubs to its Safari Park. The nearly three-week-old female cubs are being hand fed and are receiving around the clock care. (Sept. 20) Video provided by AP
Powered by NewsLook.com
Chocolate Museum Opens in Brussels

Chocolate Museum Opens in Brussels

AFP (Sep. 19, 2014) — Considered a "national heritage" in Belgium, chocolate now has a new museum in Brussels. In a former chocolate factory, visitors to the permanent exhibition spaces, workshops and tastings can discover derivatives of the cocoa bean. Duration: 01:00 Video provided by AFP
Powered by NewsLook.com
Could Grief Affect The Immune Systems Of Senior Citizens?

Could Grief Affect The Immune Systems Of Senior Citizens?

Newsy (Sep. 19, 2014) — The study found elderly people are much more likely to become susceptible to infection than younger adults going though a similar situation. Video provided by Newsy
Powered by NewsLook.com
Jury Delivers Verdict in Salmonella Trial

Jury Delivers Verdict in Salmonella Trial

AP (Sep. 19, 2014) — A federal jury has convicted three people in connection with an outbreak of salmonella poisoning five years ago that sickened hundreds of people and was linked to a number of deaths. (Sept. 19) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins